Isolated power systems are used in group 2 rooms in medical locations, and they consist of test combinations and auxiliary devices such as insulation transformer, isolation monitoring device, isolated power enclosures remote alarm panels. When isolation fault occurs with isolated power systems, it is ensured not to cause the system to energy interruption by opening protection equipments, to continue medical electrical equipments to their functions, not to decrease fault currents to non-critical values and not to live problem during operating by preventing energy interruption.Isolation level is monitored continuously in isolated power systems and converts the fault to alarm signal by detecting at adjustable level provided that it is not less than 50 kΩ. The alarm in question takes part on control panels in operating theatres and on a section where nurse or technical personnel can easily hear and then control and intervene it in other rooms by monitoring over two remote alarm panels. Alarm panels used for the purpose of remote monitoring take part in room of personnel in duty or in technical service room.